- 期刊
摻雜KCl於TiO_2-WO_3複合材料在濕度感測器上之促進效果
Promotion Effect by KCl-doped TiO_2-WO_3 Composites Materials for Humidity Sensor
摘要
本研究是使用簡單的物理混合法將TiO_2-WO_3以1:1比例混合，再摻雜不同比例之KCl，再以400℃鍛燒兩小時即可完成的感濕材料，然後利用X光繞射分析儀（XRD）、掃瞄式電子顯微鏡（SEM），來分析複合材料的表面特徵。而我們也針對其感濕的特性以不同相對濕度下的濕滯現象、反應時間（response time）和恢復時間（recovery time）來加以探討。結果顯示TiO_2-WO_3（1:1）摻入不同比例之氯化鉀的感濕複合材料中，以氯化鉀含量為10%的效果為最佳，其線性關係良好（R2=0.979），其中反應時間（response time）和恢復時間（recoverytime）由相對濕度12~90% RH分別約為15、90秒，並在添加鹽類（KCl）後其靈敏度整體都有上升的趨勢，且明顯降低了其阻抗值。因此將TiO_2-WO_3摻雜電解質鹽類（KCl）作為複合材料的濕度感測器是具有潛力且值得我們去做進一步探討及研究。
並列摘要
A humidity sensor based on KCl-doped TiO_2-WO_3 composites materials were prepared by a simple physical mixing method with various weight percentages of TiO_2-WO_3 (1:1) and KCl. The structure and morphology were characterized by XRD (X-ray diffraction), SEM (Scanning electron microscopy). The humidity sensing properties were measured by an LCR (inductance, capacitance and resistance) analyzer. The results indicate that the sample with 10% KCl-doped TiO_2-WO_3 (1:1) had better humidity sensing properties than the other samples at relative humidity (RH) in the range 12-90%. The response and recovery times were approximately 15s and 90s, respectively. The results herein demonstrate the potential of KCl-doped TiO_2-WO_3 composite for use in fabricating high-performance humidity sensors.